Yen Leaps Over Milestone

Japan scored a victory in its decadelong battle against falling prices known as deflation, as the yen tumbled to trade at 100 to the dollar for the first time in four years.

The milestone comes five weeks after the Bank of Japan surprised investors with an aggressive course of monetary easing that aims to stoke economic growth by, among other things, reducing the value of the currency, making goods manufactured in Japan more...